The losses in question stemmed from risky derivatives bets made by a trader nicknamed the London Whale. The bets, which came to light in May 2012, wound up costing the bank about $6 billion and caused a firestorm on Capitol Hill as it renewed debates over Washington's efforts to rein in excessive risk-taking on Wall Street.

Dimon's comments about Brady's call came during a discussion in which he called for moves to make sure no large bank's failure could threaten to bring down the financial system.

"We’ve got to get rid of 'too big to fail,' " Bloomberg quoted Dimon as saying. “We have to ensure big banks can be taken down without harming the public and at no cost to them.”